There are several options for treating wood cutting boards, including mineral oil, beeswax, coconut oil, and a mixture of lemon and salt. Mineral oil is a popular choice as it is food-safe, inexpensive, and easy to find. Beeswax can also be used to help seal and protect the board, while coconut oil can provide a natural antibacterial element. The lemon and salt mixture can help to remove stains and smells from the board. Whatever option is chosen, it is important to regularly treat wood cutting boards to help prolong their lifespan and prevent bacteria from growing.